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期刊论文
A Novel Directional Coupler Utilizing a Left-Handed Material
IEEE PHOTONICS TECHNOLOGY LETTERS, VOL. 16, NO.1, JANUARY 2004，-0001，（）：
A novel directional coupler with a left-handed material (LHM) layer between two single-mode (SM) waveguides of usual material is introduced. The coupling system is analyzed with the supermode theory. It is shown that such an LHM layer of finite length can shorten significantly the coupling length for the two SMwaveguides. An LHM layer with two slowly tapered ends is used to avoid the reflection loss at the ends
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